jsp登陆校验演示，servlet，login，success

最新推荐文章于 2021-06-06 09:15:00 发布

LLEGAIN

最新推荐文章于 2021-06-06 09:15:00 发布

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CC 4.0 BY-SA版权

分类专栏： #JAVA# 文章标签： jsp 登陆验证重定向转发 Servlet

本文链接：https://blog.youkuaiyun.com/Love_Legain/article/details/53555827

这是一个关于jsp登录校验的示例，通过LoginVerificationServlet进行信息校验，未连接数据库，仅预设了admin/888888为有效账号。登录失败会重定向回登录页面，成功则跳转至success-page-1.jsp，非法访问会被转发到登录界面。同时，success-page-2.jsp会检查session中的用户名以防止暴力访问。

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jsp的登录校验Demo

part_1::login.jsp:登录页面:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href="<%=basePath%>">

		<title>My JSP 'Login.jsp' starting page</title>

		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">
		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="This is my page">
		<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

	</head>

	<%
		String fdbkMsg = (String) request.getAttribute("fdbkMsg");
		if (null == fdbkMsg) {
			fdbkMsg = "";
		}
	%>

	<%
		Boolean logedIn = (Boolean) session.getAttribute("logedIn");
		if (null == logedIn) {
			logedIn = false;
		} else if (logedIn) {
			//如果在本次会话已经登陆，直接重定向到success-page-1
			response
					.sendRedirect("/ServletDemoProject/LOGIN-DEMO/success-page-1.jsp");
		}
	%>

	<%
		String username = "";
		Cookie[] cookies = request.getCookies();
		if ((null != cookies) && (cookies.length > 0)) {
			for (Cookie c : cookies) {
				if ("a